nasa will stream the approach starting at 9:00 a.m. at pacific time. the fly-by is expected to be the closest an asteroid has ever come to earth. it will be -- it will be about 17,000 miles from earth. the closest will be in indonesia. astronomers say it's about the size of a white house. >> that's a big boy. >> yeah, it is pretty big. >>> 7:54. >>> steve and i have been on fog patrol. we went on the air at 4:30 we've been watching it for hours now. steve will talk about the fog. but visibility is improving for drivers. if you are driving to the bay bridge toll plaza, that even looks a little bit better. the fog was pretty low at one point. it's backed under for about a 25 to 30-minute delay. that's your live drive time there. once you get on the bridge, another 12 to 15 minutes on the span. also, contra costa county is beginning to get slower. traffic time is way down from pleasant hill to walnut creek in danville and alamo. let's go to steve. >>> we still have areas of fog. other locations are already clear. if you are in the clear skies. that's a go